单项选择题

He was very sorry（）her at the airport.

A．not to meet
B．to not meet
C．to have not meet
D．not to have met

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单项选择题
They decided to take some actions（）the situation turned too bad.

A．until
B．unless
C．when
D．before
单项选择题
Which do you think is（）important, health or wealth7

A．the more
B．more
C．most
D．the most
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